CVE-2013-0238

ircd-hybrid < 8.0.6 - Denial of Service via Negative Mask Parsing

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2013-0238. PoCs published by kingcope.

AI-analyzed exploit summary This Perl script exploits CVE-2013-0238, a denial-of-service vulnerability in ircd-hybrid. It connects to an IRC server, joins a channel, and sends malformed MODE commands with a negative crash number to trigger the DoS.

Description

The try_parse_v4_netmask function in hostmask.c in IRCD-Hybrid before 8.0.6 does not properly validate masks, which allows remote attackers to cause a denial of service (crash) via a mask that causes a negative number to be parsed.

Exploits (1)

exploitdb WORKING POC
by kingcope · perldoslinux
https://www.exploit-db.com/exploits/24951

This Perl script exploits CVE-2013-0238, a denial-of-service vulnerability in ircd-hybrid. It connects to an IRC server, joins a channel, and sends malformed MODE commands with a negative crash number to trigger the DoS.

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: ircd-hybrid 8.0.5
No auth needed
Prerequisites: Network access to the target IRC server
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (12)

Core 12
Core References
Third Party Advisory vendor-advisory x_refsource_debian
http://www.debian.org/security/2013/dsa-2618
Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/52106
Mailing List mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2013/01/29/8
Vendor Advisory vendor-advisory x_refsource_mandriva
http://www.mandriva.com/security/advisories?name=MDVSA-2013:093
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/57610
Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/51948
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/81695
Third Party Advisory x_refsource_confirm
https://wiki.mageia.org/en/Support/Advisories/MGASA-2013-0055
Third Party Advisory, VDB Entry vdb-entry x_refsource_osvdb
http://osvdb.org/89623
Exploit, Third Party Advisory exploit x_refsource_exploit-db
http://www.exploit-db.com/exploits/24951
Issue Tracking x_refsource_confirm
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=699267

Scores

EPSS 0.3922
EPSS Percentile 97.4%

Details

CWE
CWE-20
Status published
Products (12)
ircd-hybrid/ircd-hybrid 7.2.0
ircd-hybrid/ircd-hybrid 7.2.1
ircd-hybrid/ircd-hybrid 7.2.2
ircd-hybrid/ircd-hybrid 7.2.3
ircd-hybrid/ircd-hybrid 7.3.0 (2 CPE variants)
ircd-hybrid/ircd-hybrid 7.3.1
ircd-hybrid/ircd-hybrid 8.0.0 (5 CPE variants)
ircd-hybrid/ircd-hybrid 8.0.1
ircd-hybrid/ircd-hybrid 8.0.2
ircd-hybrid/ircd-hybrid 8.0.3
... and 2 more
Published Feb 13, 2013
Tracked Since Feb 18, 2026